Simple app delegate for Swift and GIDSignIn

AppDelegate.swift

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
  var window: UIWindow?

  func application(application: UIApplication,
      didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    GIDSignIn.sharedInstance().clientID = "366667191730-38onttdkl2cpqstheip1ek3r5tb8s5ds.apps.googleusercontent.com";

    return true
  }

  func application(application: UIApplication,
    openURL url: NSURL, sourceApplication: String?, annotation: AnyObject?) -> Bool {
    return GIDSignIn.sharedInstance().handleURL(url, sourceApplication: sourceApplication, annotation: annotation)
  }
}